background_location_plus 0.0.3

Background location tracking plugin (foreground service Android + CoreLocation iOS).

example/lib/main.dart

import 'dart:async';
import 'package:flutter/material.dart';
import 'package:background_location_plus/background_location_plus.dart';

void main() => runApp(const MyApp());

class MyApp extends StatefulWidget {
  const MyApp({super.key});
  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  bool running = false;
  String last = '--';
  String speed = '--';
  String accuracy = '--';
  String timestamp = '--';
  StreamSubscription<Map<String, dynamic>>? _sub;

  @override
  void initState() {
    super.initState();
    _init();
  }

  Future<void> _init() async {
    await BackgroundLocationPlus.initialize();
    await BackgroundLocationPlus.configure(
      distanceFilter: 5,
      timeInterval: 2,
      accuracy: "best",
    );
    _sub = BackgroundLocationPlus.onLocation.listen((loc) {
      if (!mounted) return;
      setState(() {
        last = '${loc['latitude']?.toStringAsFixed(6)}, ${loc['longitude']?.toStringAsFixed(6)}';
        speed = '${loc['speed']?.toStringAsFixed(2)} m/s';
        accuracy = '${loc['accuracy']?.toStringAsFixed(1)} m';
        timestamp = '${loc['timestamp']}';
      });
    });
  }

  Future<void> _start() async {
    final ok = await BackgroundLocationPlus.requestPermissions();
    if (!ok) {
      await BackgroundLocationPlus.openAppSettings();
      return;
    }
    final r = await BackgroundLocationPlus.start();
    setState(() => running = r);
  }

  Future<void> _stop() async {
    final r = await BackgroundLocationPlus.stop();
    setState(() => running = !r);
  }

  @override
  void dispose() {
    _sub?.cancel();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: const Text('BG Location Plus')),
        body: Padding(
          padding: const EdgeInsets.all(24),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              _infoRow('Running', '$running'),
              _infoRow('Location', last),
              _infoRow('Speed', speed),
              _infoRow('Accuracy', accuracy),
              _infoRow('Timestamp', timestamp),
              const SizedBox(height: 24),
              ElevatedButton(onPressed: _start, child: const Text('Start')),
              const SizedBox(height: 8),
              ElevatedButton(onPressed: _stop, child: const Text('Stop')),
            ],
          ),
        ),
      ),
    );
  }

  Widget _infoRow(String label, String value) {
    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 4),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: [
          Text(label, style: const TextStyle(fontWeight: FontWeight.bold)),
          Flexible(child: Text(value, textAlign: TextAlign.end)),
        ],
      ),
    );
  }
}